Incorporate latest code from MD5 github repo

NEWS

@@ -9,6 +9,10 @@ changes relative to sbcl-1.3.16:
     for page faults outside of dynamic space by changing the C symbol
     "sbcl_fallback_sigsegv_handler".
   * bug fix: sb-cover does not lose source positions for AND/OR/COND.
+  * The bundled sb-md5 contrib has been updated to release 2.0.4
+    which is licensed under Creative Commons CC0 per author's statement
+    https://github.com/pmai/md5/commit/fd134e71b71a10ab78905833a7cb9d4d6817c589
+    (Refer to NEWS and COPYING in the contrib/sb-md5 subdirectory)
 
 changes in sbcl-1.3.16 relative to sbcl-1.3.15:
   * optimization: various small tweaks give around 5% faster garbage

contrib/sb-md5/COPYING

@@ -0,0 +1,130 @@
+This software has been placed into the public domain.
+
+This software is "as is", and has no warranty of any kind.  The
+authors assume no responsibility for the consequences of any use of
+this software.
+
+Additionally for all parts of this software ("The Work" below) authored
+by Pierre R. Mai copyright is waived under the CC0 as affirmed below:
+
+Creative Commons Legal Code
+
+CC0 1.0 Universal
+
+    CREATIVE COMMONS CORPORATION IS NOT A LAW FIRM AND DOES NOT PROVIDE
+    LEGAL SERVICES. DISTRIBUTION OF THIS DOCUMENT DOES NOT CREATE AN
+    ATTORNEY-CLIENT RELATIONSHIP. CREATIVE COMMONS PROVIDES THIS
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+    REGARDING THE USE OF THIS DOCUMENT OR THE INFORMATION OR WORKS
+    PROVIDED HEREUNDER, AND DISCLAIMS LIABILITY FOR DAMAGES RESULTING FROM
+    THE USE OF THIS DOCUMENT OR THE INFORMATION OR WORKS PROVIDED
+    HEREUNDER.
+
+Statement of Purpose
+
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+2. Waiver. To the greatest extent permitted by, but not in contravention
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+be judged legally invalid or ineffective under applicable law, then the
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+account Affirmer's express Statement of Purpose. In addition, to the
+extent the Waiver is so judged Affirmer hereby grants to each affected
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+irrevocable and unconditional license to exercise Affirmer's Copyright and
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+partial invalidity or ineffectiveness shall not invalidate the remainder
+of the License, and in such case Affirmer hereby affirms that he or she
+will not (i) exercise any of his or her remaining Copyright and Related
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+4. Limitations and Disclaimers.
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contrib/sb-md5/NEWS

@@ -0,0 +1,57 @@
+Release 2.0.4
+=============
+
+ * Clarified public domain status for code authored by Pierre R. Mai
+   through additional CC0 waiver.
+
+Release 2.0.3
+=============
+
+ * Add support for md5sum-string for other implementations through
+   through flexi-streams.  Patch supplied by Daniel Kochmanski.
+
+
+Release 2.0.2
+=============
+
+ * This release adds support for LispWorks 7.0, reworking the fixes
+   for 64-bit implementations of Lispworks in 2.0.1 and incorrect
+   use of the sys:simple-int32-vector type.  Patch supplied by
+   Martin Simmons from LispWorks.
+
+ * Minor fix to prevent style-warnings for implementations with no
+   support for md5sum-string.
+
+
+Release 2.0.1
+=============
+
+ * This release fixes problems on 64-bit implementations of Lispworks,
+   where sys:int32 arithmetic can overflow 32-bit values and hence
+   yield wrong results.
+
+
+Release 2.0.0
+=============
+
+ * This release consolidates the various versions of md5 that have
+   been floating around, including versions with Lispworks
+   optimizations, the version maintained by Kevin M. Rosenberg, the
+   SBCL-optimized version, and various patches and fixes.
+
+ * This release tries to separate out string-handling from actual
+   byte-based MD5 hash generation.  Hence users who want to generate
+   hashes from strings should use the new md5sum-string function,
+   which will go through your implementation's external-format
+   handling to generate the actual byte-array that is hashed.  Usage
+   of md5sum-sequence for strings and md5sum-stream for character
+   streams is deprecated, since it only ever worked correctly for 8bit
+   characters in most implementations.
+
+ * This release should work correctly on at least recentish versions
+   of CMUCL, SBCL, ECL, CCL, Lispworks, AllegroCL and ABCL and
+   generally most other conforming implementations.  It has been
+   optimized for CMUCL, SBCL and Lispworks, and should work with
+   adequate performance on most 64bit implementations.  Performance on
+   other 32bit implementations is still sub-optimal if they don't
+   support unboxed bit-operations on (unsigned-byte 32).

contrib/sb-md5/sb-md5.asd

@@ -1,13 +1,27 @@
-;;; -*-  Lisp -*-
+;;;; MD5 --- RFC 1321 The MD5 Message-Digest Algorithm
 
 (defpackage #:sb-md5-system
   (:use #:cl #:asdf))
-
 (in-package #:sb-md5-system)
 
+;;;; %File Description:
+;;;;
+;;;; This file contains the system definition form for the MD5
+;;;; Library.  System definitions use the ASDF system definition
+;;;; facility.
+;;;;
+
 (defsystem sb-md5
-  :depends-on (sb-rotate-byte)
-  :version "1.8"
+  :description "The MD5 Message-Digest Algorithm RFC 1321"
+  :author "Pierre R. Mai <pmai@pmsf.de>"
+  :maintainer "Pierre R. Mai <pmai@pmsf.de>"
+  :licence "CC0"
+  :version "2.0.4"
+  :depends-on (#+sbcl "sb-rotate-byte"
+               #-(or :cmu :sbcl
+                     (and :lispworks (not :lispworks4))
+                     :ccl :allegro)
+               "flexi-streams")
   #+sb-building-contrib :pathname
   #+sb-building-contrib #p"SYS:CONTRIB;SB-MD5;"
   :components ((:file "md5")))
@@ -21,7 +35,7 @@
 
 (defsystem sb-md5-tests
   :depends-on (sb-md5 sb-rt)
-  :version "1.8"
+  :version "2.0.4"
   :components ((:file "md5-tests")))
 
 (defmethod perform ((o test-op) (c (eql (find-system :sb-md5-tests))))